Indicating instrument



r -w COPY March 30 1926.

T. B. DRESCHER INDICATING INSTRUMENT Filed J m. 20, 1923 1 VENTOR.77860101193 as %3A TTORNEY expensively- Vmanufactured and assembled, Tothese and other ends the invention resides in certain lm'provements andcomblnations Patented Mar. 30, 1926.

U IT-(ED STATES 1 ,zriinononn B. nnnsonnn orno onns'rnn, nnw ironxi'INDIcATInG INSTRUMENT. 1 v j 1 Application filed January 20, 1923.SeriaI No. 613,991; A 7

To all whom it may concern Be it known that I, THEODORE B. DnEsoHnR,

a citizen of the United States, residingat Rochester, in 'the county ofMonroe and State of New York,have-invented certain new; and usefulImprovements in Indicating Instruments; and I do hereby declare theperature or other condition of the coolin system and ofthe motor,proper. The chie object of the invention isto providea si n ple andpractical instrument 'of this variety comprising but. few parts whichmay be inof parts all as will hereinafter be more fully described, thenovel: features being pointed outin the claims at the endof thespecifica- 131911. v a a In the drawings:

: Figure 1 is a front elevation of an instrumentv embodying thepresentinvention;

Figure 2is a side elevation of the same; Figure 3'is'a sectional 'lanview on the Figure 4 is a fragmentary detail jview partly in sectionillustrating the means for founting and vclamping the crystals in posi-Similar reference numerals throughout several views indicate the sameparts} ;The invention is embodied in the present instance in anindicating thermometer and mounting particularly adapted to be carriedby the'radiator cap .of an internal combustion motorlof an' automobile,for ez raniple',

for indicating at all times, so as to be'vi'sible from" the driversseat, the temperature de: veloped in the radiator, The presentimprovements pertain more especially to the mounting for the temperatureresponsive element or thermometer. which latter, as shown in the presentinstance, is of the com- ;mon variety having a bulb forsubjectionto thetemperatureto be measured and ne tended tubular lindicatingstein,

substantially tubular frame 0 of which the thermometer is carried andwhich is adapted for insertion through an ing spout 17 of the radiator8. Frame 5 is formed with a flange 9 adapted to'b'e seated PAVTEN oi Ffca."

Referring more particularly to draw 1 v ings, the mounting comprises,preferablypa in the ,bo e I opening] provided in a radiator capqshown at6 as of the usual type for closing the fillagainstthe outer side ofthe-"radiator cap and with afthreaded tubular portion 10 passing throughthe cap opening and fitted with looking nuts 11 forsecuringatheinstrument to the cap. The lower end ofthe frame has openings 12forn1ed=therein for exposing the thermometer bulb 13"to -theradiatortemperature; The stem of the thermometerais V, i

shown at 14 as extended outwardly or above the cap so as to beclearlyvisible from the.

drivers "seat.v At 14?.fis a dial plate supported by means'hereafterdescribed adjacent the'thermometer stem and marked with with thethermometerfluid. i

" It is desirable. to provide suitable indicia for indicatingcooperation for the indifcating'portion of the thermometer comprising il the stem and, dial described, crystal 'Jmean's for protecting thesameand also serving, f desired, as magnify ng lenses for increasing thevisibility of the indications. vSuch means preferably have the form ofsubstantially hemispherical crystals 15 as hereafter described; Forsupporting the crystals 15, frame 7 5 preferably has fixed on its upperend a}transversely'extending strap 16' of resilient, metal, having itsends 17 brought'together. opposite the frame, by Jineans describedbelow, to form z'a substantially circu lar flexible loop forembracingjandtclamp ing the crystals in position. The crystals as statedare in the, form,f substantially of hemispheres, the plane basesf18ofwhich are received in seats 19 formed inwardly from each side ofstrapw16,as shown more particularly iniF-igure 3. uThese seatspreferably have sphericallyformedsides conforming to a 'rp r p e al'suae'f f t c y t ls w t an intermediate ledge or projection 20 serving toslightly space the crystals. It is apparent fromthis construction thatby-separating the strap end 17 t0 expandqthe loop the hemispheres may bereadily arranged in the seats of the latter with their bases in Ijuxtaposition enclosing the thermometer in dicatin'g means and-the 1 0p;may! then ;bedr n nt efl tivepq mp ng' r tie w th the crystals by meanscomprising projections or sections 21, Figure 4, on the ends of thestrap and together forming a stud which is a crystal, so that it also issecured in position by the means for clamping the latter.

i for the instrument as a whole If necessary thecrystals may be slightlyindented as at 23, Figure 3, to perm'it't-hem to be brought closetogether and at the same time clear the thermometer stem/- The crystalsare preferably in the form of hollow glass hemispheres as shown {asthese lend themselves effectively to cooperation with the clamping meansdescribed above. Crystals of this shape have been found to atiord goodoptical effects and may al o be utilized as nagnifying lenses bysuitable formation of their inner surfaces as inclicated at 24:.Crystals having this form furthermore afford a pleasing appearance tothe instrument as a whole.

AS apparent from the above description the construction is exceedinglysimple and uni tary in character? comprising a, minimum number of partswhich maybe economically manufactured and assembled in securely clampedrelation with each other capable of withstanding any vibrationto whichthe instrument may be subjected in use. The simplicity of line of theframe combines with the spherical form of the crystals to afford apleasing and attractive appearance.

- I claim as my invention: v

1;. In a levice .of the class described, the combination of a frameincluding a pair of yieldable arms provided with means for attaching thesame to a'radiator cap, a temperature responsive element carried theframe having a portion arranged to extend below the inner Side of thecap for subjection to the radiator temperature and also a visibleindicating portion extended above the outer side ofthfe cap, a pair ofcrystals substantially in the form of hemispheres arranged with theirbases in juxtaposition and nclosing said indi ating portion there 'etween, said bases being disposed between said arms and; clamping meanson the arms adapted to draw them tightly into engagem n ith the crystasi .QQIn a device of the. class described, the combination ofa frameprovided with means for attaching the same'to a radiator cap, atemperature respon iv e ent carri d y th fr me ha ing a po tion a ra g do 6X- tendfbelow the inner, side, of the ap v or subjection to theradiator temperature and also a visible indicating portion extendedabove the outer side of the-cap, a pair of position and enclosing saidindicating portion therebetween a flexible metal strap on said framehaving its ends brought together "to form a loop encircling the bases ofsaid hemispheres, and means for 7 drawing the ends of said straptogether to clamp said c-rystals in position on the frame; t

31 In a device of the class described, the combination of a frameprovided with means for attaching'the same to a radiator capi atemperature responsive element carried by the frame having a portionarranged to ex tend below the inner side of the cap-for subjection tothe radiator temperature'and also a visible indicating portion extendedabove the outer side of the cap, a pair of crystals substantially in theform of' hol' low hemispheres arranged with their bases in juxtapositionand enclosing said indicating portion therebetween, one'of said crystalshavingits inner surface opposite its base shaped to produce a magnifyinglens, and clamping means ont'he frame'encircling said hem sphere basesand having.

a' clamping movement in theplane thereof for securingsaid crystals tothe frame.

p 4:. In a deviceof the claSSdeseribed, the combinationof a frameprovided with means for attaching the same to a radiator cap a stemperature responsive element carried. by

the r me .h ng' p tion arranged to'exjtend below the inner side of thecap forsuba jection to the radiator temperature and also a visibleindicating portion extendedlabove the outer side ,ofthe cap, a pair ofcrystals substantially in the form of hollow hemispheres arranged withtheir bases in juxtaposition and enclosing said indicating portion'therebetween, one of said crystals having its inner surface oppositeits base shaped to produce a magnifying lens; a' flexible metal. strap,on' said, frame having its ends brought together to form a loopencircling the bases of said hemisp heres,'and means for drawingthe endsof said strap together to clamp said crystals in lposition on the frame.

5. In a device of the class, described, =the combination of a tubularframe for insertion through an opening in the'top .of a radiator cap andprovided with means for attaching the same to thezcap, atemperatureresponsive elementin the bore of said frame having a portion arrangedtoextend below the inner side of the cap for subjection to the radiatortemperature and also an indicating portion extended into view above theouter side of the cap, a pair of crystalssubstantially in the form ofhemispheres arranged with the r bases in juxtaposi ion its ends broughttogether to form a loop encircling the bases of said hemispheres withseats formed in said strap from each side to receive said bases,threaded stud sections on said loop ends, and a capping nut for engagement with said sections to hold said loop in clamping engagementwith said crystals.

6. In a device of the class described the combination of a frame fora-temperature responsive element including a base having oppositelyextended arms with their free ends terminating in juxtaposition andprovided with upstanding portions disposed one adjacent another, a pairof crystals sub stantially in the form of hemispheres disposed betweensaid arms and constructed to permit the temperature responsive elementto be inserted therein, and connecting means for said upstandingportions adapted a;

cause said arms to be clamped upon the crystals. j

7 In a device of the class described, the

oppositely extending'arms with their free ends provided with ofl'setportions terminating in juxtaposition and each of the armsbeing providedwith an inwardly extending rib, a pair of crystals substantially in theform of hemispheres having their bases disk posed on the opposite sidesof said ribs, and in engagementwith the inner faces of said arms, andmeans for connecting the oflset portions of the arms to clamp them uponthe crystals.

THEODORE B. DRESCHER." i

